my tetris dx score on the basic tetris mode (forget what it's called on there) was at least 900,000 i'm pretty sure me and my sister got it into the 1 millions before deleteing it though to start all over (it got boring after a while, it'd be like days before we'd get another high score and it made clearing the board hard as all hell)

we would both go back and forth playing and beating each other's score's it really honed my skills.